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توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Ladefoged, P. (1967). Three areas of experimental phonetics: Stress and respiratory activity, the nature of vowel quality, units in the perception and production of speech. Oxford U.P..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Ladefoged, Peter. Three Areas of Experimental Phonetics: Stress and Respiratory Activity, the Nature of Vowel Quality, Units in the Perception and Production of Speech. London: Oxford U.P., 1967.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Ladefoged, Peter. Three Areas of Experimental Phonetics: Stress and Respiratory Activity, the Nature of Vowel Quality, Units in the Perception and Production of Speech. Oxford U.P., 1967.